Improvement in stoves



G. F. HILL.

Stove.

No. 216,677. Patented June 17, 1879.

N PETES, PHOTO-LITHOGRAPNER. WASMNGTON. D c,

"UNITED STATES PATENT OFFICE CHARLES F. HILL, OF HAZLETON, PENNSYLVANIA.

IMPROVEMENT IN STOVES.

Specification forming part of Letters Patent N 0. 216.677, dated June17, 1879; application filed April 7, 18121.

To all who). it may concern.-

Be it known that LOHARLES F. HILL, of

Hazleton, in the county of Luzerne and State of Pennsylvania, haveinvented certain new and useful Improvements in Stoves; and ldo herebydeclare that the following isa full, clear,

and exact description of the invention, which will enable others skilledin the art to which it-appertains to make and use the same, referencebeing bad to the accompanying drawings, which form a part of thisspecification.

Figure 1 is a vertical sectional view of my improved stove for burningcoal waste or culm. Fig. 2 is a side view of the cylindrical grate. Fig.3 is a plan view of the lower grate; and Fig. 4 is a cross'section onthe line as 00, Fig. 1.

Similar letters of reference denote corresponding parts in all thefigures.

My invention relates to certain improvements in stoves, the object ofwhich is to enable culm (coal-waste) or the very fine grades ofanthracite coal to be readily consumed. The difficulty heretoforeexperienced in this class of stoves or furnaces has been the apparentimpracticability of suppyling a sufficiency of air for the perfectcombustion of the gases which are so freely generated by this kind offuel. This objection, however, I overcome by the peculiar constructionand arrangement of parts, which I shall now proceed more fully todescribe, with reference to the drawings, in

openings or scallops, substantially as shown in the drawings, in orderthat a draft of air may pass through them by the inner side of the bodyof the cylinder.

Upon a cross-bar, D, over the ash-box I support what I term thecylindrical grate. This is a cylinder con strncted, substantially asshown, of cast-iron rings E and a solid top or cap, E, suitablyconnected, and each slanting downwardly toward the fire-box, as shown.Air passing from the ash box upwardly through the cylinder will alsopass between the open-work grate bars or rings into the fire-box.

Over the cylinder-grate is arranged a reservoir, F, for calm, which isfed from there into the fire-box. Said reservoir, the mouth of whichsurrounds the conical cap of the cylindrical grate, is surrounded byaflue, G, which, it will be seen, is a directupward continuation of thefire-box.

B is the ash-box. Upon this, and forming the bottom of the firebox, is agrate or bottom, K. This consists of the ceutralpiece or cross-bar, D,upon which, as above stated, the

cylindrical grate is supported. and to which it is detachably but firmlyconnected, and at the sides of which the side pieces, D D, are hinged.The side pieces maybe supported in a horizontal position by any suitabledevice, the withdrawal of which permits the said side pieces to dropdown, thus emptying the firebox.

The entire grate K, which is arranged to be oscillated or shaken by anysuitable means, is provided with suitably-sized openings k, alternatingwith upward projections l, the former admitting a draft of air, and, theobject of the latter being to stir the fuel contained in the fire-box.

It has been already stated that the cylindrical grate is supported uponthe central portion or cross-bar, D, of grate K. It should be added thatthe latter is provided with an opening, m, registering with the centralpassage or opening through the cylindrical grate, and that the latter isprovided with a rotary fan, n, the operating-rod of which, 0, passesupward through a tube, 1), projecting upwardly from the top or cap ofthe cylindrical grate. Any suitable mechanism may be employed to operatesaid fan, the suction of which forces the air from the ash-box upthrough the cylindrical grate until it strikes thetop or cap thereof,when it is deflected between the rings of said grate downward into thefire-box. This fan is no necessary-adjunct of my invention; but it maybe used advantageously, especially in starting the fire.

From, the foregoing description, and by reference to the drawings heretoannexed, it will be seen that a strong draft of air is provided bot-hcentrally through and circumferentially by the sides of the fire-box.The tendency of the fuel which I design to use to cake or lump together,thus making it difficult or impossible to supply a sufficiency of aireven with the best of draft, is overcome by my peculiar improvedconstruction of the fire-box, hereinbefore described, which makes suchcakin g to any considerable extent quite impossible, and

by which, under all circumstances, a free and perfect draft is providedcentrally as well as circumferentially in the fire-box.

I will here state that in order to loosen or '"break the fuel as it isbeing fed into the firebox the projections or ledges O U and the ringsor bars of the cylindrical grate may be made of varying widths, or ofincreasing width from the top to the bottom, as represented in thedrawings.

Having thus described my invention, I cl aim and desire to secure byLetters Patent of the United States 1. In a stove or furnace for burningculm or coal-waste, an annular fire-box provided upon its outer wallswith downward projecting ledges, and having its inner walls formed by acylindrical grate consisting of suitably-coir nected rings slanting fromthe inner to the outer side, substantially as and for the purposeherein' shown and specified.

2. In a stove or furnace for burning culni or coal-waste, thecombination of an oscillating fire-box bottom, a cylindrical grate fixedupon said oscillating bottom and having a conical top piece or cap, anda fuel-reservoir arranged around and above said top piece or cap, andsurrounded by a flue or combustion-chamber, forming a direct upwardcontinuation of the annular fire-box, as set forth.

3. The combination, with the cylindrical grate provided with asuitably-operated rotary fan, of the fire-box bottom or grate having acentral opening directly below the central opening or passage in thecylindrical grate,

in which said fan is placed, substantially as herein set forth.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

CHARLES F. HILL.

' Witnesses:

O. W. KLINE, J. G. RUDDIMAN.

